According to a new list compiled by the National Motorists Association, a drivers-rights advocacy organization, the worst speed traps in North America are in a suburb of Dallas, a small city in Michigan and a town in Ontario, Canada.

The NMA's official definition of a speed trap is a spot that "combine[s] arbitrarily low speed limits with heavy traffic enforcement designed to generate ticket revenue."

Flower Mound, Texas; Livonia, Mich.; and Windsor, Ontario, were the three worst offenders by the NMA's criteria. But special recognition also went to Detroit, where 187 speed traps are reported in towns surrounding Detroit Metropolitan Wayne County Airport.